Computer system and network slice management method

ABSTRACT

A network operating system (NOS) acquires, for a plurality of network functions that achieve a network slice constructed on a mobile wireless communication network, information on an operation of each network function which is measured by one or more apparatus configured to provide at least a part of the plurality of network functions. The NOS derives an evaluation index value of each of the plurality of network functions based on the information on the operation of each of the plurality of network functions, and derives an evaluation index value of the network slice based on the evaluation index values of the plurality of network functions.

TECHNICAL FIELD

The present disclosure relates to a data processing technology, and more particularly, to a computer system and a network slice management method.

BACKGROUND ART

Through use of a technology for virtualizing network functions, it is possible to set a plurality of logical partitions on a common hardware resource and operate a virtual network function (VNF) within each logical partition. Further, through allocation of the hardware resource to be used by the logical partitions from an overall common resource pool, it is possible to improve resource utilization efficiency. Such logical partitions are called “network slices.”

In Patent Literature 1, there is proposed a method for associating network functions with network slice instances of a mobile radio communication network.

CITATION LIST Patent Literature

[Patent Literature 1] JP 2019-521533 A

SUMMARY OF INVENTION Technical Problem

Hitherto, it has been possible to acquire an evaluation index value (for example, throughput and connection completion rate) per device. However, when a plurality of network slices are constructed on one device as described above, the evaluation index value per device is a value that combines performances of the plurality of network slices, and this value may not always be useful for evaluating individual network slices. The inventors have thought that a method of evaluating a state, performance, and the like of each of the network slices has not been sufficiently proposed so far.

The present disclosure has been made based on the recognition of the above-mentioned problem by the inventors, and has an object to provide a technology for assisting in management of network slices constructed on a mobile wireless communication network.

Solution to Problem

In order to solve the above-mentioned problem, according to one aspect of the present disclosure, there is provided a computer system including: an acquisition module configured to acquire, for a plurality of network functions that achieve a network slice constructed on a mobile wireless communication network, information on an operation of each of the plurality of network functions which is measured by one or more apparatus configured to provide at least a part of the plurality of network functions; and a derivation module configured to derive an evaluation index value of each of the plurality of network functions based on the information on the operation of each of the plurality of network functions which is acquired by the acquisition module, and derive an evaluation index value of the network slice based on the evaluation index values of the plurality of network functions.

According to another aspect of the present disclosure, there is provided a network slice management method. The method is executed by a computer, and includes the steps of: acquiring, for a plurality of network functions that achieve a network slice constructed on a mobile wireless communication network, information on an operation of each of the plurality of network functions which is measured by one or more apparatus configured to provide at least a part of the plurality of network functions; and deriving an evaluation index value of each of the plurality of network functions based on the information on the operation of each of the plurality of network functions which is acquired in the step of acquiring information, and deriving an evaluation index value of the network slice based on the evaluation index values of the plurality of network functions.

Any combination of the components described above, and modes in which the expressions in the present disclosure are adapted to, for example, a device, a computer program, or a recording medium in which a computer program is readably recorded, are also valid modes of the present disclosure.

Advantageous Effects of Invention

According to the present disclosure, it is possible to assist in the management of the network slices constructed on the mobile wireless communication network.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram for illustrating a computer system according to a first embodiment of the present invention.

FIG. 2 is a diagram for schematically illustrating an example of a purchase screen.

FIG. 3 is a diagram for illustrating an example of a service requirement input screen.

FIG. 4 is a diagram for illustrating an example of a purchase confirmation screen.

FIG. 5 is a diagram for illustrating an example of the purchase confirmation screen.

FIG. 6 is a diagram for illustrating an example of data structure of a bundle file.

FIG. 7 is a diagram for illustrating a hierarchical structure of a plurality of types of network elements.

FIG. 8 is a diagram for illustrating an example of an NSI and an NSSI.

FIG. 9 is a diagram for illustrating an example of an onboarding screen.

FIG. 10 is a functional block diagram for illustrating an example of functions to be implemented by an MPS and an NOS in one embodiment of the present invention.

FIG. 11 is a diagram for illustrating an example of data structure of a data group generated based on the bundle file.

FIG. 12 is a diagram for illustrating an example of data structure of physical inventory data.

FIG. 13 is a diagram for schematically illustrating an example of data structure of logical inventory data.

FIG. 14 is a diagram for illustrating an example of resource management data.

FIG. 15 is a diagram for illustrating an example of data structure of planned data.

FIG. 16 is a diagram for schematically illustrating an example of the planned data.

FIG. 17 is a diagram for illustrating an example of assumed busy level data.

FIG. 18 is a diagram for illustrating an example of the resource management data.

FIG. 19 is a diagram for illustrating an example of CNFD.

FIG. 20 is a diagram for illustrating a day 0 parameter.

FIG. 21 is a diagram for schematically illustrating a process performed during construction of an NSI and an NSSI.

FIG. 22A is a flow chart for illustrating an example of a flow of processes to be performed by a vendor terminal, the MPS, and the NOS in the one embodiment of the present invention.

FIG. 22B is a flow chart for illustrating an example of the flow of processes to be performed by the vendor terminal, the MPS, and the NOS in the one embodiment of the present invention.

FIG. 23 is a flow chart for illustrating an example of the flow of processes to be performed by a purchaser terminal, the MPS, and the NOS in the one embodiment of the present invention.

FIG. 24 is a flow chart for illustrating an example of the flow of processes to be performed by the purchaser terminal, the MPS, and the NOS in the one embodiment of the present invention.

FIG. 25A is a flow chart for illustrating an example of a flow of processes to be performed by the NOS in the one embodiment of the present invention.

FIG. 25B is a flow chart for illustrating an example of the flow of processes to be performed by the NOS in the one embodiment of the present invention.

FIG. 25C is a flow chart for illustrating an example of the flow of processes to be performed by the NOS in the one embodiment of the present invention.

FIG. 25D is a flow chart for illustrating an example of the flow of processes to be performed by the NOS in the one embodiment of the present invention.

FIG. 25E is a flow chart for illustrating an example of the flow of processes to be performed by the NOS in the one embodiment of the present invention.

FIG. 25F is a flow chart for illustrating an example of the flow of processes to be performed by the NOS in the one embodiment of the present invention.

FIG. 25G is a flow chart for illustrating an example of the flow of processes to be performed by the NOS in the one embodiment of the present invention.

FIG. 26 is a diagram for schematically illustrating cooperation among a plurality of functional blocks of the NOS in a second embodiment of the present invention.

FIG. 27 is a diagram for illustrating an example of network hierarchy data relating to a given purchaser.

DESCRIPTION OF EMBODIMENTS First Embodiment

FIG. 1 is a diagram for illustrating a computer system 1 according to a first embodiment of the present invention. The computer system 1 is an information processing system which performs a data process relating to construction and management of a network service.

As illustrated in FIG. 1 , in the computer system 1 of the first embodiment, a marketplace system (MPS) 10, a network operating system (NOS) 12, a purchaser terminal 14, a vendor terminal 16, a plurality of core network systems 20, and a plurality of base station apparatus 22 are connected to a computer network 24, for example, the Internet. The core network system 20, the base station apparatus 22, and the computer network 24 operate in cooperation with each other to achieve a mobile wireless communication network.

The core network system 20 is a system corresponding to an evolved packet core (EPC) in a fourth generation mobile communication system (hereinafter referred to as “4G”) or a 5G core network (5GC) including an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), and the like in a fifth generation mobile communication system (hereinafter referred to as “5G”). The core network system 20 in this embodiment is implemented by a group of servers arranged in a plurality of data centers provided at various locations. A plurality of servers are arranged in each data center. Although two core network systems 20 are illustrated in FIG. 1 , the number of core network systems 20 in this embodiment is not limited to two, and may be one or three or more.

The base station apparatus 22 is a computer system corresponding to an eNodeB (eNB) in 4G and an NR base station (gNB) in 5G, and a computer system provided with an antenna 22 a. The base station apparatus 22 in this embodiment includes one or a plurality of servers (servers 90 described later). The base station apparatus 22 may be implemented by a group of servers arranged in a data center.

Further, a virtual Distributed Unit (vDU) and a virtual Central Unit (vCU), which are components of a radio access network (RAN) in 4G, may be arranged in the base station apparatus 22 or may be incorporated in a part of the core network system 20. In the same manner, a DU and a CU, which are components of the RAN in 5G, may be arranged in the base station apparatus 22 or may be incorporated in a part of the core network system 20.

The MPS 10 in this embodiment is configured, for example, on a cloud platform and includes a processor 10 a, a storage 10 b, and a communicator 10 c, as illustrated in FIG. 1 . The processor 10 a is a program control device, for example, a microprocessor which operates in accordance with a program installed in the MPS 10. The storage 10 b is, for example, a storage element such as a ROM or RAM, a solid state drive (SSD), a hard disk drive (HDD), or the like. The storage 10 b stores a program to be executed by the processor 10 a, and the like. The communicator 10 c is, for example, a communication interface such as a network interface card (NIC) or a wireless LAN module. The communicator 10 c transmits and receives data to/from the NOS 12 and the purchaser terminal 14 via the computer network 24.

The NOS 12 in this embodiment is configured, for example, on a cloud platform and includes a processor 12 a, a storage 12 b, and a communicator 12 c, as illustrated in FIG. 1 . The processor 12 a is a program control device, for example, a microprocessor which operates in accordance with a program installed in the NOS 12. The storage 12 b is, for example, a storage element such as a ROM or RAM, a solid state drive (SSD), a hard disk drive (HDD), or the like. The storage 12 b stores a program to be executed by the processor 12 a, and the like. The communicator 12 c is, for example, a communication interface such as an NIC or a wireless LAN module. The communicator 12 c transmits and receives data to/from the MPS 10, the purchaser terminal 14, the vendor terminal 16, the core network system 20, and the base station apparatus 22 via the computer network 24.

In this embodiment, in response to a purchase request for a network service by a purchaser, the network service for which the purchase request has been made is constructed in the core network system 20 or the base station apparatus 22. Then, the constructed network service is provided to the purchaser.

For example, a network service such as a voice communication service, a data communication service, or the like is provided to the purchaser who is a mobile virtual network operator (MVNO). The voice communication service or the data communication service provided in this embodiment is eventually provided to a customer (end user) for the purchaser (MVNO in the above-mentioned example), who uses a user equipment (UE) 26 illustrated in FIG. 1 . The end user can perform voice communication or data communication to/from other users via the core network system 20 or the base station apparatus 22.

Further, the network service provided in this embodiment is not limited to a voice communication service and a data communication service. The network service provided in this embodiment may be, for example, an IoT service. Then, for example, an end user who uses a robot arm, a connected car, or the like may be a purchaser of the network service in this embodiment.

Further, in this embodiment, a container type application execution environment, for example, Docker, is installed in the servers arranged in the core network system 20 and the base station apparatus 22, and containers can be deployed in those servers and operated. The network service provided to the purchaser in this embodiment is implemented by a cloud-native network function (CNF)), which is a container-based functional unit.

The purchaser terminal 14 in this embodiment is, for example, a general computer used by the purchaser described above, such as a smartphone, a tablet terminal, or a personal computer.

FIG. 2 is a diagram for illustrating an example of a purchase screen displayed on the purchaser terminal 14 in this embodiment. On the purchase screen illustrated in FIG. 2 , a type of network service to be purchased by the purchaser can be selected with a radio button. Here, when the purchaser specifies a voice communication service and clicks a “NEXT” button 30, the purchaser terminal 14 displays the service requirement input screen illustrated in FIG. 3 .

On the service requirement input screen, the purchaser can enter service requirements for the network service to be purchased by the purchaser. In the example of FIG. 3 , the number of subscribers, an opposite IP, a monitoring target, a monitoring interval, a target area, and a password can be set. The “opposite IP” refers to an IP address serving as an access point for the network system already possessed by the purchaser.

When the purchaser enters those service requirements and clicks the “NEXT” button 32, service requirement data associated with the input onto the service requirement input screen is transmitted to the MPS 10.

The service requirement data includes, for example, the subscriber number data indicating the number of subscribers, opposite IP data indicating the opposite IP, monitoring target data indicating the monitoring target, monitoring interval data indicating the monitoring interval of the monitoring target, target area data indicating the target area of the network service to be purchased, and password data indicating the password. The service requirement data is not required to include all of those pieces of data, and may include data indicating requirements other than those requirements.

Then, based on the service requirement data, the MPS 10 cooperates with the NOS 12 to confirm whether or not it is possible to secure a server that satisfies the service requirements indicated by the service requirement data. For example, in this case, the MPS 10 determines whether (1) it is possible to secure a server that satisfies the service requirements, (2) it is possible to secure a server that satisfies the service requirements by setting up a free server, or (3) it is impossible to secure a server that satisfies the service requirements.

When a result of the determination is “(1)” or “(2)”, the purchaser terminal 14 displays a purchase confirmation screen illustrated in FIG. 4 that indicates that the service can be immediately provided. When the result of the determination is “(3)”, the purchaser terminal 14 displays a purchase confirmation screen illustrated in FIG. 5 that indicates that a predetermined turnaround time is required (for example, a turnaround time of 2 weeks is required).

When the purchaser clicks a “PURCHASE” button 34 illustrated in FIG. 4 or FIG. 5 , a network service for which the purchase request has been made is constructed and provided to the purchaser.

Meanwhile, when the purchaser clicks a “CANCEL” button 36 illustrated in FIG. 4 or FIG. 5 , the purchase is canceled.

As described above, according to this embodiment, a network service that satisfies various purchaser's needs is flexibly constructed. Without being aware of the detailed implementation of the network service, the purchaser can receive the provision of a desired network service by only specifying some service requirements.

The vendor terminal 16 in this embodiment is a general computer used by a vendor, for example, a service provider related to the network service, such as a smartphone, a tablet terminal, a personal computer, or the like.

In this embodiment, the vendor is provided with a continuous integration (CI)/continuous delivery (CD) pipeline including a development environment, a verification environment, and a test environment. In this embodiment, a verified bundle file corresponding to the network service to be provided to the purchaser, which is created by the vendor, is on-boarded by an onboarding process utilizing the CI/CD pipeline.

The bundle file in this embodiment is, for example, a file obtained by compressing a file group having a predetermined directory structure (for example, a file having tar.gz format).

FIG. 6 is a diagram for illustrating an example of data structure of the bundle file in this embodiment. As illustrated in FIG. 6 , the bundle file in this embodiment includes business section data, technology section data, security section data, and operation section data.

The business section data shows business requirements of the network service such as the name of the network service, license requirements, and the definition of service level agreement (SLA). Further, the business section data in this embodiment includes data indicating mandatory input items and optional input items for the service requirements of the network service.

The technology section data shows, for example, the configuration of a functional unit group that achieves the network service. Further, the technology section data shows, for example, the configurations of applications and CNFCs that form the network service.

Further, the technology section data shows a hierarchical structure which includes, for example, a network service (hereinafter referred to as “NS”), a network function (cloud-native network function (hereinafter referred to as “CNF”)), and a cloud-native network function component (CNFC). The CNF and the CNFC are linked to the NS below the NS. In addition, the technology section data shows the hierarchical structure which includes, for example, a network service, a network slice subnet (hereinafter referred to as “NSSI”), and a network slice (also referred to as “NSI”). The NSSI and NSI are linked to the NS above the NS. That is, the technology section data shows a hierarchical structure of a plurality of types of network elements, that is, a correspondence relationship of the plurality of types of network elements.

FIG. 7 shows a hierarchical structure of a plurality of types of network elements. The NSI and the NSSI have a one-to-many relationship, and the NSSI and the NS have a many-to-many relationship. The NS and the CNF have a one-to-many relationship, and the CNF and the CNFC also have a one-to-many relationship. The data showing the hierarchy structure of the plurality of types of network elements is also referred to as “network hierarchy data.” The network hierarchy data includes data showing the correspondence relationship between one or more NSIs and a plurality of NSSIs, data showing the correspondence relationship between a plurality of NSSIs and a plurality of NSes, data showing the correspondence relationship between a plurality of NSes and a plurality of CNFs, and data showing the correspondence relationship between a plurality of CNFs and a plurality of CNFCs.

FIG. 8 shows an example of the NSIs and the NSSIs. The NSIs can be said to be end-to-end virtual circuits that span a plurality of domains (for example, from the RAN to the core network). Each NSI may be a slice for high-speed and high-capacity communication, a slice for high-reliability and low-latency communication, or a slice for connecting a large quantity of terminals. The NSSIs can be said to be single domain virtual circuits dividing an NSI. Each NSSI may be a slice of a RAN domain, a slice of a mobile back haul (MBH) domain, or a slice of a core network domain. Further, as illustrated in FIG. 8 , a plurality of NSIs may share the same NSSI.

The NSes may be a 5G core network (5GC), a 4G core network (EPC), a 5G RAN, or a 4G RAN. The CNFs may be a plurality of types of network functions in a 5G core network, for example, an AMF, an SMF, or a UPF. Further, the CNFs may be a plurality of types of network functions in a 4G core network, for example, a mobility management entity (MME), a home subscriber server (HSS), or a serving gateway (S-GW).

The CNFCs may be a microservice deployed to the server as one or more containers. For example, a given CNFC may be a microservice which provides a part of the functions of an eNodeB (that is, an LTE base station) or a gNB (that is, a 5G base station). Another CNFC may be a microservice which provides a part of the functions among the core network functions such as the AMF or the MME.

Referring back to FIG. 6 , the security section data shows, for example, the security definition of the network service, for example, installation credentials.

The operation section data shows, for example, the monitoring policy regarding the network service, such as monitoring target metrics and monitoring intervals.

FIG. 9 is a diagram for illustrating an example of an onboarding screen displayed on the vendor terminal 16 in this embodiment. In this embodiment, when the vendor specifies a path in which the bundle file is arranged and then clicks an “ONBOARDING” button 40, the bundle file becomes on-boarded.

As described above, in this embodiment, the vendor can easily perform onboarding of the network service without being aware of the actual location at which a developed file group is on-boarded.

The functions of the MPS 10 and the NOS 12 in this embodiment and processes to be executed by the MPS 10 and the NOS 12 are further described in the following.

FIG. 10 is a functional block diagram for illustrating an example of functions implemented by the MPS 10 and the NOS 12 in this embodiment. The plurality of functional blocks illustrated in the block diagram of the present application can be configured from, in terms of hardware, a circuit block, a memory, and other LSIs, and in terms of software, can be implemented by the CPU executing a program loaded onto the memory. Consequently, a person skilled in the art would understand that those functional blocks can be implemented in various forms by only hardware, by only software, or by a combination of hardware and software. The MPS 10 and the NOS 12 in this embodiment are not required to implement all of the functions illustrated in FIG. 10 and may implement functions other than those illustrated in FIG. 10 .

As illustrated in FIG. 10 , the MPS 10 functionally includes, for example, a bundle management module 50, a product catalog storage 52, and a purchase management module 54.

The bundle management module 50 and the purchase management module 54 are implemented mainly by the processor 10 a and the communicator 10 c. The product catalog storage 52 is implemented mainly by the storage 10 b.

The above-mentioned functions may be implemented by executing, by the processor 10 a, a program that is installed in the MPS 10, which is a computer, and that includes instructions corresponding to the above-mentioned functions. This program may be supplied to the MPS 10 via a computer-readable information storage medium such as an optical disc, a magnetic disk, a magnetic tape, a magneto-optical disc, a flash memory, or the like, or via the Internet or the like.

Further, as illustrated in FIG. 10 , the NOS 12 functionally includes, for example, a bundle development module 60, an orchestration (E2EO: End-to-End-Orchestration) module 62, a service catalog storage 64, an inventory management module 66, a Configuration Management as a Service (CMaaS) module 68, a service manager module 70, a slice manager module 72, a monitoring management module 74, a security setting module 76, a plurality of container management modules 78, a repository module 80, an inventory database 82, and a Bare Metal as a Service (BMaaS) module 84.

The bundle development module 60 and the E2EO module 62 are implemented mainly by the processor 12 a and the communicator 12 c. The service catalog storage 64, the repository module 80, and the inventory database 82 are implemented mainly by the storage 12 b. The inventory management module 66, the CMaaS module 68, the service manager module 70, the slice manager module 72, the monitoring management module 74, the security setting module 76, and the container management modules 78 are implemented mainly by the processor 12 a and the storage 12 b. The BMaaS module 84 is implemented mainly by the processor 12 a.

The above-mentioned functions may be implemented by executing, by the processor 12 a, a program that is installed in the NOS 12, which is a computer, and that includes instructions corresponding to the above-mentioned functions. This program may be supplied to the NOS 12 via a computer-readable information storage medium such as an optical disc, a magnetic disk, a magnetic tape, a magneto-optical disc, a flash memory, or the like, or via the Internet or the like.

Further, FIG. 10 also shows a plurality of servers 90 included in the core network systems 20 and the base station apparatus 22 illustrated in FIG. 1 and distributed and arranged at various locations. Each of the plurality of container management modules 78 in this embodiment is associated with a server group that is a part of the plurality of servers 90.

In each of the plurality of container management modules 78 in this embodiment, for example, a container management tool such as Kubernetes, and a package manager such as Helm are installed. The container management module 78 executes life cycle management of a container including the construction of the container such as the deployment and setting of the container for a server group (a plurality of servers 90) associated with the container management module 78.

The container management module 78 is not required to be included in the NOS 12. The container management module 78 may be provided in, for example, a server 90 (that is, the core network system 20 or the base station apparatus 22) managed by the container management module 78, or a server that is annexed to the server 90.

For example, in this embodiment, the bundle development module 60 receives a bundle file from the vendor terminal 16. Then, for example, in this embodiment, the bundle development module 60 generates a data group having data structure illustrated in FIG. 11 , based on the received bundle file. The data group illustrated in FIG. 11 is obtained by reconstructing the contents of the bundle file received by the bundle development module 60.

As illustrated in FIG. 11 , the data group generated by the bundle development module 60 includes product catalog data, service catalog data, inventory template data, CM template data, service template data, slice template data, monitoring script data, security script data, Helm chart data, and container image data.

The product catalog data is, for example, data corresponding to business section data included in a bundle file. As described above, the product catalog data shows information regarding business requirements of the network service, such as the name of the network service displayed on the purchase screen illustrated in FIG. 2 , license requirements, and the definition of the service level agreement (SLA).

Further, the product catalog data in this embodiment includes data indicating mandatory input items and optional input items for the service requirements of the network service. In this embodiment, for example, the purchase screen illustrated in FIG. 2 and the service requirement input screen illustrated in FIG. 3 are generated based on the product catalog data.

The service catalog data is, for example, data corresponding to a part of the technology section data included in the bundle file. The service catalog data contains a workflow script for constructing the network service.

Further, the service catalog data may include requirement configuration correspondence data indicating the correspondence between a value of the above-mentioned service requirement data and the configuration of a functional unit group (for example, CNF group) constructed in response to a purchase request.

For example, the service catalog data may include requirement configuration correspondence data indicating the correspondence between the value of the service requirement data, the type of a functional unit group, and the number of functional units for each type. For example, the requirement configuration correspondence data may show that “20,000 subscribers correspond to one packet data network gateway (P-GW),” “20,000 subscribers correspond to one IP multimedia system (IMS),” and “20,000 subscribers correspond to one home subscriber server (HSS)”. What is associated with the service requirement data is not limited to the type and the number of 4G components, and the service requirement data and the type and the number of 5G components may be associated with each other.

Further, for example, the requirement configuration correspondence data may indicate the correspondence between the value of the service requirement data and a location at which each functional unit included in a functional unit group constructed in response to a purchase request is to be constructed. In this case, the location associated with the value of the service requirement data in the requirement configuration correspondence data may be different depending on functional units included in the functional unit group to be constructed.

The inventory template data is, for example, data corresponding to a part of the technology section data and a part of the security section data included in the bundle file. The inventory template data is, for example, template data indicating the logic used by the inventory management module 66.

The CM template data is, for example, data corresponding to a part of the technology section data and a part of the operation section data included in the bundle file, and is, for example, template data indicating the logic used by the CMaaS module 68.

The service template data is, for example, data corresponding to a part of the technology section data included in the bundle file, and is, for example, template data indicating the logic used by the service manager module 70. The service template data includes the information required by the service manager module 70 to construct the network service. Specifically, the service template data includes, of the network hierarchy data illustrated in FIG. 7, at least information defining the NSes, the CNFs, and the CNFCs that are to be constructed by the service manager module 70 and information showing the correspondence relationship among the NSes, the CNFs, and the CNFCs.

The slice template data is, for example, data corresponding to a part of the technology section data included in the bundle file, and is, for example, template data indicating the logic used by the slice manager module 72.

The slice template data includes information on a “generic network slice template” defined by the GSM Association (GSMA) (“GSM is a trademark”). Specifically, the slice template data includes network slice template data (NST), network slice subnet template data (NSST), network service template data, and also includes information showing the hierarchical structure of those network elements (for example, the above-mentioned network hierarchy data). The NST and the NSST include SLA information on network slice instances (NSIs) and network slice subnet instances (NSSIs).

The SLA information includes one or more key performance indicators (KPIs) relating to the NSIs and NSSIs based on metric data to be monitored, and calculation logic for calculating each KPI. Further, the SLA information includes information on a threshold value to be used during monitoring and a threshold value (for example, an abnormality detection threshold value) to be compared to the calculated KPIs.

The monitoring script data is, for example, data corresponding to a part of the operation section data included in the bundle file, and is, for example, data indicating a monitoring script executed by the monitoring management module 74.

The security script data is, for example, data corresponding to a part of the security section data included in the bundle file, and is, for example, data indicating a script regarding security executed by the security setting module 76.

The Helm chart data is, for example, data corresponding to a part of the operation section data included in the bundle file, and is data indicating a script template (Helm chart) used by the container management module 78.

The container image data is, for example, data corresponding to a part of the operation section data included in the bundle file, and is, for example, container image data of a container included in the functional unit group that achieves the network service. The container image data includes one or a plurality of container images. A container image ID, which is an identifier of the container image, is linked to each of the one or the plurality of container images.

In this embodiment, in response to the reception of a bundle file, the bundle development module 60 determines a bundle ID that corresponds to a data group generated based on the bundle file. A bundle ID is uniquely assigned to each generated data group.

Then, the bundle development module 60 links the product catalog data included in the data group corresponding to the bundle ID to the determined bundle ID, and then transmits the product catalog data to the MPS 10.

Further, the bundle development module 60 outputs the service catalog data included in the data group to the E2EO module 62 after linking the service catalog data to the determined bundle ID. Then, the E2EO module 62 stores the service catalog data in the service catalog storage 64.

Further, the bundle development module 60 links the inventory template data, the CM template data, the service template data, the slice template data, the monitoring script data, the security script data, the Helm chart data, and the container image data to the bundle ID corresponding to the data group, and then stores the pieces of data in the inventory management module 66, the CMaaS module 68, the service manager module 70, the slice manager module 72, the monitoring management module 74, the security setting module 76, the container management module 78, and the repository module 80, respectively.

As described above, in this embodiment, the product catalog data, the service catalog data, the inventory template data, the CM template data, the service template data, the slice template data, the monitoring script data, the security script data, the Helm chart data, and the container image data become linked to one another by the bundle ID.

Further, in this embodiment, the vendor can easily provide the network service by a simple operation of, for example, specifying a path of the bundle file.

In this embodiment, for example, the bundle management module 50 receives the product catalog data linked to the bundle ID transmitted from the bundle development module 60. Then, the bundle management module 50 stores the received product catalog data in the product catalog storage 52.

In this embodiment, for example, the product catalog storage 52 stores the product catalog data linked to the bundle ID as described above.

In this embodiment, for example, the purchase management module 54 receives from the purchaser terminal 14 a network service construction request, such as a purchase request for a network service, which is linked to the bundle ID and the service requirement data. A bundle ID linked to a purchase request is hereinafter referred to as “purchase bundle ID,” and service requirement data linked to a purchase request is hereinafter referred to as “purchase service requirement data.”

Then, the purchase management module 54 transmits the purchase service requirement data linked to the purchase bundle ID to the E2EO module 62 in response to the reception of the purchase request described above.

Further, in cooperation with the E2EO module 62 and the inventory management module 66, the purchase management module 54 identifies the turnaround time of the network service purchased by the purchaser. Then, the purchase management module 54 notifies the purchaser of the identified turnaround time. The purchase management module 54 generates, for example, a purchase confirmation screen indicating the identified turnaround time, and transmits the generated purchase confirmation screen to the purchaser terminal 14.

In this embodiment, the inventory database 82 is, for example, a database in which inventory information for a plurality of servers 90 managed by the NOS 12 and arranged in the core network system 20 and the base station apparatus 22 is stored.

In this embodiment, for example, the inventory database 82 stores inventory data including the physical inventory data illustrated in FIG. 12 and the logical inventory data illustrated in FIG. 13 . The inventory data shows the status of resources managed by the NOS 12 (for example, resource usage status).

FIG. 12 is a diagram for illustrating an example of the data structure of the physical inventory data. The physical inventory data illustrated in FIG. 12 is associated with one server 90. The physical inventory data illustrated in FIG. 12 includes, for example, a server ID, location data, building data, floor number data, rack data, an allocated resource pool group ID, an allocated resource pool ID, specification data, network data, and operating container ID list.

The server ID included in the physical inventory data is, for example, an identifier of the server 90 associated with the physical inventory data.

Location data included in the physical inventory data is, for example, data indicating the location of the server 90 (for example, the address of the location) associated with the physical inventory data.

Building data included in the physical inventory data is, for example, data indicating a building (for example, a building name) in which the server 90 associated with the physical inventory data is arranged.

Floor number data included in the physical inventory data is, for example, data indicating a floor number at which the server 90 associated with the physical inventory data is arranged.

Rack data included in the physical inventory data is, for example, an identifier of a rack in which the server 90 associated with the physical inventory data is arranged.

An allocated resource pool group ID included in the physical inventory data is, for example, an identifier of a resource pool group to which the server 90 associated with the physical inventory data is allocated.

An allocated resource pool ID included in the physical inventory data is, for example, an identifier of a resource pool to which the server 90 associated with the physical inventory data is allocated. A resource pool indicated by the allocated resource pool ID is any resource pool included in a resource pool group corresponding to the allocated resource pool group ID. In this embodiment, a free server is assigned to any resource pool group. However, it is undetermined to which resource pool included in the resource pool group the free server is assigned. For such a free server, “Null” is set as the value of the allocated resource pool ID included in the corresponding physical inventory data.

The specification data included in the physical inventory data is data indicating the specifications of the server 90, such as the number of cores, the memory capacity, and the hard disk capacity, of the server 90 associated with the physical inventory data.

The network data included in the physical inventory data is, for example, data indicating an NIC included in the server 90 associated with the physical inventory data, the number of ports included in the NIC, and the like.

The operating container ID list included in the physical inventory data is, for example, data indicating a list of identifiers (container IDs) of one or a plurality of container instances operating in the server 90 associated with the physical inventory data.

FIG. 13 is a diagram for schematically illustrating an example of the data structure of logical inventory data. As illustrated in FIG. 13 , the logical inventory data includes network service (NS) data, cloud-native network function (CNF) data, CNFC data, pod data, and container data.

The NS data is, for example, data indicating attributes such as an identifier of an instance of a network service corresponding to virtual RAN (vRAN) and the type of the network service. The CNF data is, for example, data indicating attributes such as an identifier of an instance of a network function corresponding to eNodeB or the like and the type of the network function. Further, the CNF data may be data in units of the vCU or vDU forming the eNodeB, for example. The CNFC data is data indicating attributes such as an identifier of an instance of a CNFC and the type of the CNFC. The pod data is data indicating attributes such as the identifier of an instance of a pod included in the CNFC and the type of the pod. The “pod” refers to a minimum unit for managing a Docker container by Kubernetes. The container data is data indicating attributes such as the container ID of an instance of a container included in the pod and the type of the container.

Data indicating attributes such as the host name and the IP address may be set in the above-mentioned data included in the logical inventory data. For example, the container data may include data indicating the IP address of a container corresponding to the container data. Further, for example, the CNFC data may include data indicating the IP address and the host name of a CNFC indicated by the CNFC data.

The above-mentioned data has a hierarchical structure, and the NS data is linked to one or a plurality of pieces of CNF data respectively corresponding to one or a plurality of network functions included in a network service corresponding to the NS data. Further, the CNF data is linked to one or a plurality of pieces of CNFC data respectively corresponding to one or a plurality of CNFCs included in a network function corresponding to the CNF data. Further, the CNFC data is linked to one or a plurality of pieces of pod data respectively corresponding to one or a plurality of pods included in a CNFC corresponding to the CNFC data. Further, the pod data is linked to one or a plurality of pieces of container data respectively corresponding to one or a plurality of containers included in a pod corresponding to the pod data.

With the container ID of the container data included in the logical inventory data and the container ID included in the operating container ID list included in the physical inventory data, an instance of the container and the server 90 on which the instance of the container is operating become linked to each other.

In this embodiment, a network service to be purchased by the purchaser (a network service associated with product catalog data) is not required to correspond to a network service associated with the NS data. For example, the network service to be purchased by the purchaser may be achieved by a functional unit group corresponding to a network function associated with one or a plurality of pieces of CNF data, or may be achieved by a functional unit group associated with one or a plurality of pieces of CNFC data. Further, the network service to be purchased by the purchaser may be achieved by a functional unit group associated with one or a plurality of pods, or may be achieved by a functional unit group associated with one or a plurality of containers.

Further, as illustrated in FIG. 13 , the logical inventory data in this embodiment includes a plurality of pieces of resource pool management data that are associated with respective resource pool groups.

FIG. 14 is a diagram for illustrating an example of resource pool management data in this embodiment. The resource pool management data indicates the statuses of a plurality of resource pools included in a resource pool group associated with the resource pool management data.

The resource pool management data illustrated in FIG. 14 includes a resource pool group ID, a plurality of pieces of resource pool data, and free server number data.

The resource pool group ID included in the resource pool management data is an identifier of a resource pool group associated with the resource pool management data.

The free server number data included in the resource pool management data is data indicating the number of free servers allocated to the resource pool group associated with the resource pool management data.

The resource pool data is data indicating the statuses of resource pools included in a resource pool group associated with the resource pool management data.

As illustrated in FIG. 14 , the resource pool data includes a resource pool ID, total core number data, remaining core number data, and CNF type data.

The resource pool ID is an identifier of a resource pool.

The total core number data is data indicating the total number of cores of a server 90 allocated to the resource pool. The total core number data is a specific example of resource total amount data indicating the total amount of hardware resources included in the resource pool.

The remaining core number data is data indicating the number of remaining cores of the server 90 allocated to the resource pool. The remaining core number data is a specific example of resource remaining amount data indicating the remaining amount of the hardware resources included in the resource pool.

The CNF type data is data indicating one or more types of CNFs linked to the resource pool. The CNF type data is a specific example of functional unit type data indicating one or more types of functional units linked to the resource pool.

In this embodiment, a resource pool group that spans a plurality of locations may be preset, or a resource pool group that is associated with only one location may be preset. In any case, the resource pool group is associated with one or a plurality of locations indicated by the physical inventory data.

Further, the inventory management module 66 can appropriately grasp the resource status in cooperation with the container management module 78. Then, the inventory management module 66 appropriately updates the inventory data stored in the inventory database 82 based on the latest resource status.

In this embodiment, the E2EO module 62 and the inventory management module 66 identify the configuration of a functional unit group that achieves a network service to be purchased, for example, based on the service requirement data received from the purchase management module 54.

For example, the E2EO module 62 acquires, from the service catalog storage 64, service catalog data corresponding to a purchase bundle ID linked to the purchase service requirement data received from the purchase management module 54. The E2EO module 62 executes a workflow script indicated by the service catalog data.

The E2EO module 62 and the inventory management module 66 generate planned data illustrated as an example in FIG. 15 and FIG. 16 based on the purchase service requirement data received from the purchase management module 54, the service catalog data linked to the purchase bundle ID, the inventory template data linked to the purchase bundle ID, and the inventory data. The planned data is, for example, data indicating the configuration of a functional unit group that achieves a network service to be purchased. This process is executed, for example, with the execution of the workflow script by the E2EO module 62 as a trigger.

FIG. 15 is a diagram for illustrating an example of the data structure of planned data in this embodiment. FIG. 16 is a diagram for schematically illustrating an example of the planned data in this embodiment. The planned data in this embodiment includes an inventory key being an identifier of the planned data. The inventory key is uniquely assigned to the planned data when the planned data is generated. Further, the planned data includes a purchase bundle ID (“0010” in the example of FIG. 16 ). In addition, the planned data includes a user ID being an identifier of the purchaser (user) who has made a purchase request.

Further, the planned data may include a value that is set to the purchase service requirement data. The planned data illustrated in FIG. 15 and FIG. 16 includes the value of opposite IP data, the value of monitoring target data, the value of monitoring interval data, and the value of password data included in the purchase service requirement data.

In this embodiment, the planned data includes functional unit configuration data for each of functional units included in the functional unit group that achieves the network service to be purchased. The functional unit configuration data includes, for example, CNFC type data indicating the type of the functional unit, host name data indicating the host name, IP address data indicating the IP address, and a plurality of pieces of container configuration data associated with respective containers forming the functional unit.

For example, based on the purchase service requirement data, the E2EO module 62 may identify the number of functional unit groups that are constructed. For example, the E2EO module 62 may identify the respective types of functional unit groups that achieve the network service to be purchased and the number of functional units for each type, based on the purchased service requirement data and the requirement configuration correspondence data included in the service catalog data. For example, when the number of subscribers indicated by the service requirement data is 50,000, functional unit groups that are constructed may be identified as three P-GWs, three IMSes, and three HSSes based on the above-mentioned requirement configuration correspondence data.

Then, the E2EO module 62 may output the data indicating the respective types of functional unit groups and the number of functional units for each type to the inventory management module 66 along with the service requirement data. Then, the inventory management module 66 may determine the host name and the IP address assigned to each functional unit based on the data and the inventory data. For example, the host name and the IP address may be determined so as not to be the same as host names or IP addresses that are already being used. Then, the planned data including the host name data indicating the determined host name and the IP address data indicating the determined IP address may be generated.

Further, as described above, based on the purchase service requirement data, the E2EO module 62 may identify the location at which each of the functional units included in the constructed functional unit group is constructed. For example, the E2EO module 62 may determine the location of each functional unit included in the constructed functional unit group based on the target area data included in the purchase service requirement data and the requirement configuration correspondence data included in the service catalog data. A different location may be determined for each functional unit. Then, for each functional unit, a host name and an IP address available at the location determined for the functional unit may be determined as the host name and the IP address of the functional unit. Then, the planned data including the host name data indicating the determined host name and the IP address data indicating the determined IP address may be generated.

Further, based on the purchase service requirement data, the E2EO module 62 may identify, for each of a plurality of locations, the type and the number of functional units constructed at the location. In this case, in accordance with the location that is identified based on the purchase service requirement data, the E2EO module 62 may determine the number of functional units for each type that are constructed at the location. Further, the E2EO module 62 may determine the number of functional units for each type that are constructed for each location based on a weight set for each location identified based on the purchase service requirement data.

For example, the E2EO module 62 may store assumed busy level data illustrated in FIG. 17 . The assumed busy level data illustrated in FIG. 17 indicates, for example, the population of an area covered by one or a plurality of cells under the control of a data center linked to the assumed busy level data. The value of the assumed busy level data is an example of the weight set for each location described above.

The assumed busy level data for the data center of the core network system 20 indicates, for example, the population of the area covered by the cells of one or a plurality of base station apparatus 22 communicating to/from the core network system 20.

Then, for example, more functional units may be deployed at a location with a higher population indicated by the assumed busy level data. For example, it is assumed that the total number “n” of vDUs to be deployed is identified based on the subscriber number data included in the purchase service requirement data. Then, it is assumed that a plurality of data centers, which are vDUs' deployment destinations, and are located within a target area indicated by the target area data, are identified based on the target area data included in the purchase service requirement data. In this case, based on the value of the assumed busy level data for each identified data center, the number of vDUs obtained by proportionally dividing the total number “n” of identified vDUs may be deployed at each data center.

As illustrated in FIG. 15 , the container configuration data includes, for example, a container ID, a container image ID, required resource data, a resource pool group ID, a resource pool ID, and a connected container ID list.

The container ID is, for example, as described above, an identifier uniquely assigned to an instance of a container corresponding to the container configuration data.

As the container image ID included in the container configuration data, for example, a container image ID assigned to a container image of the container corresponding to the container configuration data is set.

The required resource data is, for example, data indicating a resource required to operate the container. In this embodiment, for example, the inventory template data indicates, for each container, the resource required to operate the container. The inventory management module 66 sets the value of the required resource data based on the inventory template data.

For the resource pool group ID included in the container configuration data, for example, the value of the resource pool group ID of a resource pool group to which the container corresponding to the container configuration data is assigned is set. The inventory management module 66 may determine a resource pool group ID for which the container is constructed based on, for example, the location determined as described above and the inventory data.

For the resource pool ID included in the container configuration data, for example, the value of the resource pool ID of a resource pool to which the container corresponding to the container configuration data is assigned is set. The inventory management module 66 may determine a resource pool ID based on, for example, the type of the container and the resource pool management data.

The connected container ID list is a list of container IDs of containers connected to the container. In this embodiment, for example, the inventory template data indicates, for each container, the type of a container connected to the container. The inventory management module 66 determines the value of the connected container ID list based on, for example, the inventory template data and the inventory data.

When the planned data is to be generated, the E2EO module 62 identifies a resource pool in which a new functional unit group is deployed and a required resource in cooperation with the inventory management module 66. The E2EO module 62 may identify a resource pool linked to a functional unit identified in response to the reception of a network service construction request, for example, the reception of a purchase request. Further, the E2EO module 62 may identify a resource pool group based on the target area of the network service to be purchased. For example, the resource pool group may be identified based on the target area indicated by the target area data included in the purchase service requirement data. Then, the E2EO module 62 may identify a resource pool in which a new functional unit group is deployed from among resource pools included in the identified resource pool group.

Further, the E2EO module 62 determines whether or not a hardware resource (for example, the server 90 in this case) in which the new functional unit group is deployed can be secured. For example, it is determined whether (1) the server 90 can be secured, (2) the server 90 can be secured by setting up an unused hardware resource (for example, a free server in this case) that is not included in any resource pool, or (3) the server 90 cannot be secured.

In the case of “(2)”, the E2EO module 62 determines whether or not a predetermined specific type of functional unit is deployed in an unused hardware resource (for example, a free server in this case).

When a specific type of functional unit is deployed, the E2EO module 62 identifies a resource pool linked to the specific type of functional unit. For example, the resource pool is identified based on the resource pool management data.

In this embodiment, for example, the resource pool ID of the resource pool group identified as described above and the resource pool ID of the identified resource pool are set in the container configuration data.

In this embodiment, based on, for example, the configuration of the functional unit group identified as described above and template data in which the configuration is acceptable as a parameter, the CMaaS module 68, the service manager module 70, and the slice manager module 72 identify a construction procedure of the functional unit group. The construction procedure includes, for example, a procedure of container configuration management such as deploying a container and setting the deployed container and a container related to the deployed container. This process is executed, for example, with the execution of the workflow script by the E2EO module 62 as a trigger.

The CMaaS module 68, the service manager module 70, the slice manager module 72, and the container management module 78 construct a functional unit group by executing the identified construction procedure. This process is also executed, for example, with the execution of the workflow script by the E2EO module 62 as a trigger.

Each of the functional units included in the functional unit group may be constructed at a location identified for the functional unit.

Further, for example, the number of functional unit groups identified based on the purchase service requirement data may be constructed.

Further, for example, for each of a plurality of locations, an identified number of functional units of a type identified for the location may be constructed.

The CMaaS module 68 and the BMaaS module 84 secure, for example, a hardware resource (for example, the server 90 in this case) in which a new functional unit group is deployed.

Further, the CMaaS module 68 and the BMaaS module 84 perform a system software setup in accordance with a specific type of functional unit on an unused hardware resource. In this embodiment, for example, the CMaaS module 68 or the BMaaS module 84 stores a script (for example, an Ansible script) for performing a setup for the above-mentioned specific type of functional unit. The script describes, for example, a procedure of installing a host OS serving as a platform of a container execution environment, a procedure of setting a kernel of the host OS, a procedure of setting a basic input output system (BIOS), which have a specific type or a specific version. Then, by the execution of the script by the BMaaS module 84, a system software setup in accordance with the specific type of functional unit is performed on a free server. For example, the setup of the host OS and the BIOS of the container execution environment is performed on the free server.

Then, the CMaaS module 68 and the BMaaS module 84 update the resource pool management data so as to add the unused hardware resource on which the system software setup is performed to the identified resource pool. Such addition of the hardware resource to the resource pool is detected by the container management module 78 which manages the hardware resource. Then, the inventory management module 66 updates inventory data that corresponds to the added hardware resource (server 90). This allows the resource pool to include the hardware resource on which the system software setup in accordance with the specific type of functional unit is performed.

For example, vDU is assumed to be a specific type of functional unit. It is also assumed that the number of cores required for vDU is 5 and the number of free server cores is 50.

In this case, a resource pool linked to vDU is identified when a network service including vDU is purchased. In the example of FIG. 14 , a resource pool having a resource pool ID of “C” is identified. Then, whether or not the remaining hardware resources of this resource pool are sufficient is examined. Then, when the remaining hardware resources are insufficient, a system software setup in accordance with vDU is performed on one free server. Then, the server 90 on which the system software setup has been performed is added to the resource pool C, and the resource pool management data is updated to the resource pool management data illustrated in FIG. 18 .

In this manner, in this embodiment, a system software setup in accordance with one or more types of functional units linked to the resource pool is performed on the hardware resources included in the resource pool corresponding to the resource pool data.

Depending on the type of a functional unit, sufficient performance may not be able to be exhibited by using a general-purpose server having a general configuration. To deal with the problem, for such a specific type of functional unit, it is desired that a dedicated setup be performed on hardware resources, for example, a server, with regard to system software such as a host OS and BIOS. In this case, one possible option is to prepare in advance the required number of hardware resources on which such a dedicated system software setup has been performed before the network service is started to be provided, and, when required, deploy the functional unit on the prepared hardware resources.

However, it is difficult to estimate the optimal amount of hardware resources on which the system software setup in accordance with the specific type of functional unit is to be performed in advance before the network service is started to be provided. Further, when the system software setup in accordance with the specific type of functional unit is performed on many hardware resources with an enough margin, such hardware resources are not suitable for the deployment of other functional units and thus result in wasting of resources.

In this embodiment, as described above, when a specific type of functional unit is deployed on an unused hardware resource, a system software setup in accordance with the specific type of functional unit is performed on an unused hardware resource. Then, the unused hardware resource on which the system software setup has been performed is added to a resource pool linked to the specific type of functional unit.

In this manner, according to this embodiment, it is possible to effectively utilize hardware resources on which various functional units that achieve a network service are deployed.

In this embodiment, the functional units may be identified based on results of demand forecasting. For example, based on the results of the demand forecasting, functional units predicted to be in short supply in the near future may be identified. Then, a resource pool linked to the functional units thus identified may be identified. Then, an unused hardware resource on which a system software setup in accordance with the functional units has been performed may be added to the resource pool.

When the hardware resource for deploying a new functional unit group is secured, the service manager module 70 instructs the container management module 78 to deploy the new functional unit group, for example, based on the above-mentioned planed data and service template data linked to the purchase bundle ID stored in the service manager module 70. The service template data can accept a part or all of the planned data as a parameter.

A CNF descriptor (CNFD) is an example of the above-mentioned service template data. FIG. 19 is a diagram for illustrating an example of the CNFD. The service manager module 70 generates, for example, a day 0 parameter (CNF instance) illustrated in FIG. 20 based on the planned data and the CNFD. For example, the day 0 parameter illustrated in FIG. 20 in which a host name and the value of an IP address of the CNFD illustrated in FIG. 19 are set is generated.

The CNFD may include a template associated with each of a plurality of deployment flavors. Then, for example, the service manager module 70 may generate the day 0 parameter based on a template corresponding to a deployment flavor in accordance with the purchase service requirement data.

The service manager module 70 may identify the location of the output destination of the day 0 parameter. For example, one or a plurality of container management modules 78 that serve as output destinations of the day 0 parameter may be identified. For example, a container management module 78 associated with a server 90 arranged at the location of a resource pool indicated by the container configuration data of the planned data may be identified. Then, a day 0 parameter that is output to each of identified locations may be generated. For example, a day 0 parameter that is output to each of one or a plurality of container management modules 78 that serve as the output destinations may be generated.

Then, the service manager module 70 outputs each of the generated one or plurality of day 0 parameters to a container management module 78 serving as the location of the output destination of the day 0 parameter. A purchase bundle ID is linked to the day 0 parameter.

Then, the container management module 78 deploys a new functional unit group based on the received day 0 parameter. The container management module 78 identifies a container image to be deployed and a resource pool in which the container is deployed, for example, based on Helm chart data associated with the purchase bundle ID and on the received day 0 parameter. Then, the container management module 78 acquires the container image from the repository module 80 and deploys a container corresponding to the container image in the identified resource pool. For example, a manifest file is generated based on the Helm chart data associated with the purchase bundle ID and on the received day 0 parameter. Then, the deployment of a container is executed through use of the manifest file.

Further, the CMaaS module 68 generates planned CM data including a day 1 parameter, for example, based on the above-mentioned planned data and CM template data stored in the CMaaS module 68 and linked to the purchase bundle ID. The CM template data can accept a part or all of the planned data as a parameter.

The day 1 parameter indicates, for example, a configuration management procedure, for example, the settings of a deployed functional unit group and at least one functional unit related to the functional unit group (for example, a functional unit communicating to/from the deployed functional unit group). A day 1 parameter relating to the base station apparatus 22 indicates, for example, radio field intensity, the direction and angle of the antenna 22 a, a serial number, and the like. A day 1 parameter relating to a serving-gateway (S-GW) indicates, for example, information indicating an opposite node (information indicating a mobility management entity (MME) or an access point name (APN) of a communication partner), the host name or FQDN of a Remote Authentication Dial In User Service (RADIUS) server, and the like.

Then, the CMaaS module 68 executes configuration management, for example, the setting of the functional unit, based on the day 1 parameter included in the generated planned CM data. Those processes are executed, for example, with the execution of the workflow script by the E2EO module 62 as a trigger.

Then, the slice manager module 72 executes, for example, instantiation of a network slice pertaining to a network service to be purchased, based on the above-mentioned planned data and slice template data linked to the purchase bundle ID stored in the slice manager module 72. The slice template data can accept a part or all of the planned data as a parameter. This process is executed, for example, with the execution of the workflow script by the E2EO module 62 as a trigger.

The slice manager module 72 includes a network slice management function (NSMF) and a network slice sub-network management function (NSSMF) described in the 3GPP specification “TS28 533.” The NSMF is a function for generating and managing network slices, and provides NSI management. The NSSMF is a function for generating and managing network slice subnets forming a part of a network slice, and provides NSSI management.

The slice manager module 72 may include a storage (not shown) which stores information on the NSIs and NSSIs. The storage may also store a slice service type (SST, for example, MBB and V2X), an ID of the NSI (NSI-ID), an ID of the NSSI (NSSI-ID), and an ID of the NS (NS-ID).

The slice manager module 72 outputs, based on the slice template data, a configuration management instruction relating to instantiation of network slices and network slice subnets to the CMaaS module 68. At that time, the slice manager module 72 assigns IDs to the NSIs and NSSIs in the configuration, and stores the ID information in the storage. As a modification example, the CMaaS module 68 may assign IDs to the NSIs and NSSIs in accordance with the configuration management instruction received from the slice manager module 72, and may notify the ID information to the slice manager module 72. The slice manager module 72 may store the ID information received from the CMaaS module 68 in the storage. The slice manager module 72 may store, for topology management, the ID of each NSI, NSSI, and NS in the storage in association with the NSIs, NSSIs, and NSes linked in the network hierarchy data of the slice template data.

Description is now given of an example of a process of constructing an NSI and an NSSI. FIG. 21 schematically shows a process performed during construction of an NSI and an NSSI. Apparatus “a” to “c” of FIG. 21 correspond to a plurality of servers 90. The slice manager module 72 passes, to the CMaaS module 68, a configuration management instruction including setting information for setting an NSI and an NSSI on each apparatus.

The CMaaS module 68 constructs the NSI and the NSSI on each apparatus by using known segment routing technology (for example, SRv6 (segment routing IPv6)) based on the setting information passed from the slice manager module 72. For example, the CMaaS module 68 may generate an NSI and NSSI extending over a plurality of CNFs to be set which are constructed on a plurality of apparatus by issuing, to the plurality of CNFs to be set, a command to set a common virtual local area network (VLAN) and a command to assign a bandwidth and a priority indicated by the setting information to the VLAN.

When setting the NSI and the NSSI for the plurality of CNFs to be set which are constructed on the plurality of apparatus, the slice manager module 72 sets a type and an identification tag of the metric data to be notified to the monitoring management module 74 in the CNFCs included in each CNF to be set. The identification tag is data including a value which can uniquely identify each CNFC from among the plurality of CNFCs. In other words, the identification tag is data including a different value for each CNFC.

The slice manager module 72 holds SLA information on the NSIs and NSSIs included in the slice template data. In the SLA information, KPI calculation logic and a threshold value for generating an alarm are defined. The slice manager module 72 identifies a pod (also referred to as “container” or “CNFC”) linked to the NSIs and NSSIs for which the KPI calculation is to be performed from the management table, and instructs the monitoring management module 74 to calculate the KPI for each NSI and NSSI based on the metric data output from the pod.

The slice manager module 72 may output a configuration management instruction related to the instantiation of the network slice to the CMaaS module 68. Then, the CMaaS module 68 may execute configuration management, for example, settings in accordance with the configuration management instruction.

For example, the CMaaS module 68 may execute configuration management regarding new functional unit groups when the deployment of the new functional unit groups is completed, and then execute configuration management related to the instantiation of the network slice.

As another example, the CMaaS module 68 may update a once-generated day 1 parameter based on the configuration management instruction received from the slice manager module 72. Then, the CMaaS module 68 may collectively perform the configuration management related to the new functional unit groups and the instantiation of the network slice.

In this embodiment, for example, the monitoring management module 74 identifies a monitoring policy indicated by the purchase service requirement data based on the above-mentioned planned data and monitoring script data linked to the purchase bundle ID stored in the monitoring management module 74. Then, the monitoring management module 74 executes a monitoring setting in accordance with the identified monitoring policy. Then, in accordance with the identified monitoring policy, the monitoring management module 74 monitors a functional unit group which is constructed. For example, monitoring of a monitoring target indicated by the purchase service requirement data may be executed at a monitoring interval indicated by the purchase service requirement data. This process is executed, for example, with the execution of the workflow script by the E2EO module 62 as a trigger.

The monitoring management module 74 may acquire, for example, a log from a sidecar which outputs the value of the metric of the monitoring target linked to the container of the monitoring target as a log at the above-mentioned monitoring interval. Then, the monitoring management module 74 may accumulate the log. Then, the monitoring management module 74 may, for example, transmit the log to the purchaser terminal 14 in response to a request from the purchaser terminal 14.

The monitoring management module 74 acquires the value of the metric to be monitored which is linked to the CNFC (microservice) to be monitored by using known monitoring software, and calculates the KPI based on the acquired metric value and predetermined calculation logic. The known monitoring software may be Prometheus. The monitoring management module 74 outputs alert information when the calculated KPI value exceeds a predetermined threshold value or the KPI value is less than a predetermined threshold value.

The monitoring management module 74 may calculate the KPI values for the NSIs and NSSIs based on an instruction from the slice manager module 72. Further, in order to calculate the KPI values for the NSIs and NSSIs, the monitoring management module 74 may calculate the KPIs of the NSes, CNFs, and CNFCs associated with those NSIs and NSSIs.

For example, in this embodiment, the security setting module 76 executes a security setting, for example, a password setting, in accordance with the value of the purchase service requirement data based on, for example, the above-mentioned planned data and the security script data stored in the security setting module 76 and linked to the purchase bundle ID.

The respective flows of processes performed by the vendor terminal 16, the MPS 10, and the NOS 12 when the “ONBOARDING” button 40 is clicked by a vendor on an onboarding screen illustrated in FIG. 9 is described with reference to flowcharts illustrated in FIG. 22A and FIG. 22B.

First, the vendor terminal 16 transmits bundle data arranged in a path specified on the onboarding screen to the bundle development module 60 of the NOS 12 (Step S101).

Then, the bundle development module 60 develops the bundle data received in the process step of Step S101 and generates a data group illustrated in FIG. 11 (Step S102).

Then, the bundle development module 60 determines a bundle ID corresponding to the data group generated in the process step of Step S102 (Step S103).

The bundle development module 60 then transmits product catalog data included in the data group generated in the process step of Step S102 that is linked to the bundle ID determined in the process step of Step S103 to the bundle management module 50 of the MPS 10. Then, the bundle management module 50 of the MPS 10 stores the received product catalog data in the product catalog storage 52 (Step S104).

The bundle development module 60 then outputs to the E2EO module 62 service catalog data included in the data group generated in the process step of Step 5102 that is linked to the bundle ID determined in the process step of Step S103. Then, the E2EO module 62 stores the received service catalog data in the service catalog storage 64 (Step S105).

The bundle development module 60 causes the inventory management module 66 to store inventory template data included in the data group generated in the process step of Step S102 that is linked to the bundle ID determined in the process step of Step S103 (Step S106).

Then, the bundle development module 60 stores CM template data included in the data group generated in the process step of Step S102 that is linked to the bundle ID determined in the process step of Step S103 in the CMaaS module 68 (Step S107).

The bundle development module 60 then stores service template data included in the data group generated in the process step of Step S102 that is linked to the bundle ID determined in the process step of Step S103 in the service manager module 70 (Step S108).

Then, the bundle development module 60 stores slice template data included in the data group generated in the process step of S102 that is linked to the bundle ID determined in the process step of Step S103 in the slice manager module 72 (Step S109).

The bundle development module 60 stores monitoring script data included in the data group generated in the process step of Step S102 that is linked to the bundle ID determined in the process step of Step S103 in the monitoring management module 74 (Step S110).

Then, the bundle development module 60 stores security script data included in the data group generated in the process step of Step S102 that is linked to the bundle ID determined in the process step of Step S103 in the security setting module 76 (Step S111).

The bundle development module 60 then stores Helm chart data included in the data group generated in the process step of Step S102 that is linked to the bundle ID determined in the process step of Step S103 in the container management module 78 (Step S112). For example, the bundle development module 60 may store the Helm chart included in the data group generated in the process step of Step S102 in a plurality of container management modules 78. Further, Helm chart data associated with the container management module 78 may be stored in the container management module 78.

Then, the bundle development module 60 stores container image data included in the data group generated in the process step of Step S102 that is linked to the bundle ID determined in the process step of Step S103 in the repository module 80 (Step S113), and the process illustrated in this process example is ended.

A summary is now given of operations performed during onboarding of the bundle data uploaded from the vendor terminal 16. The bundle data includes a plurality of types of template data including the slice template data and the service template data. The bundle development module 60 receives the bundle data uploaded from the vendor terminal 16, and distributes the plurality of types of template data included in the bundle data to the plurality of functional blocks of the NOS 12 in association with the service indicated by the bundle data. For example, the bundle development module 60 provides the slice template data to the slice manager module 72 and provides the service template data to the service manager module 70.

The slice template data includes the SLA information on the NSIs and NSSIs to be provided to the purchaser of the service. The SLA information includes the type of the KPI to be monitored, the calculation logic of the KPI, and a threshold value to be used as a standard for evaluating the KPI. In addition, the NSI-NSSI-NS hierarchical structure (correspondence relationship) is further described in the slice template data. The types of the NSes, CNFs, and CNFCs to be constructed, and definition information are described in the service template data.

With reference to the flowchart illustrated in FIG. 23 , description is now given of the flow of processes executed by the purchaser terminal 14, the MPS 10, and the NOS 12 when the “NEXT” button 32 is clicked by the purchaser on the service requirement input screen illustrated in FIG. 3 .

First, the purchaser terminal 14 transmits the purchase service requirement data linked to the purchase bundle ID to the purchase management module 54 of the MPS 10 (Step S201). The purchase bundle ID is the bundle ID of a network service selected by the purchaser on the purchase screen illustrated in FIG. 2 . The purchase service requirement data is service requirement data indicating the details of input onto the service requirement input screen illustrated in FIG. 3 .

Then, the purchase management module 54 of the MPS 10 transmits the purchase service requirement data linked to the purchase bundle ID received in the process step of Step S201 to the E2EO module 62 of the NOS 12 (Step S202).

The E2EO module 62 of the NOS 12 then generates availability inquiry data based on the service catalog data linked to the purchase bundle ID (Step S203). For example, availability inquiry data that indicates the types of functional unit groups that achieve the network service to be purchased and the number of functional units for each type is generated.

Then, the E2EO module 62 outputs the availability inquiry data generated in the process step of Step S203 to the inventory management module 66 (Step S204).

Then, the inventory management module 66 generates availability data based on the received availability inquiry data, inventory data, and inventory template data (Step S205). For example, availability data that indicates whether (1) a hardware resource in which a functional unit group indicated by the received availability inquiry data is deployed can be secured, (2) the hardware resource can be secured by adding a free server to the resource pool, or (3) the hardware resource cannot be secured is generated.

Then, the inventory management module 66 transmits the availability data generated in the process step of Step S205 to the E2EO module 62 (Step S206).

The E2EO module 62 then generates reply data based on the availability data received in the process step of Step S206 (Step S207). For example, when the availability data indicates “(1)” or “(2)” described above, reply data indicating “OK” is generated, and when the availability data indicates “(3)” described above, reply data indicating “NG” is generated.

Then, the E2EO module 62 transmits the reply data generated in the process step of Step S207 to the purchase management module 54 of the MPS 10 (Step S208).

The purchase management module 54 then generates a purchase confirmation screen based on the reply data received in the process step of Step S208 (Step S209). For example, when the received replay data indicates “OK”, a purchase confirmation screen illustrated in FIG. 4 indicating that the service can be immediately provided is generated. Meanwhile, when the received reply data indicates “NG”, a purchase confirmation screen illustrated in FIG. 5 indicating that a predetermined turnaround time is required (for example, turnaround time of 2 weeks is required) is generated.

Then, the purchase management module 54 transmits the purchase confirmation screen generated in the process step of Step S209 to the purchaser terminal 14 (Step S210).

The purchaser terminal 14 then displays the purchase confirmation screen received in the process step of Step S210 on the display of the purchaser terminal 14 (Step S211), and the process shown in this process example is ended.

With reference to the flowchart illustrated in FIG. 24 , description is given of the flow of processes executed by the purchaser terminal 14, the MPS 10, and the NOS 12 when the “PURCHASE” button 34 is clicked by the purchaser on the purchase confirmation screen illustrated in FIG. 4 or FIG. 5 .

First, the purchaser terminal 14 transmits a purchase request for the network service to the purchase management module 54 of the MPS 10 (Step S301). It is assumed that the purchase request is linked to the purchase bundle ID and the purchase service requirement data transmitted in the process step of Step S201.

Then, the purchase management module 54 transmits to the E2EO module 62 the purchase request linked to the purchase bundle ID and the purchase service requirement data received in the process step of Step S301 (Step S302).

The E2EO module 62 then identifies service catalog data corresponding to the purchase bundle ID linked to the received purchase request (Step S303).

Then, the E2EO module 62 acquires the service catalog data identified in the process step of Step S303 from the service catalog storage 64 and executes the workflow script indicated by the service catalog data (Step S304), and the process shown in this process example is ended.

The details of the process step of Step S304 is now described with reference to the flowcharts illustrated in FIG. 25A to FIG. 25G.

First, the E2EO module 62 and the inventory management module 66 generate planned data based on the purchase service requirement data linked to the purchase request, service catalog data, inventory template data, and inventory data (Step S401). The process to be executed in Step S401 includes, for example, a process of identifying a resource pool in which a functional unit group is deployed, and a required resource.

Then, the inventory management module 66 stores the generated planned data in the inventory database 82 (Step S402).

The inventory management module 66 then outputs an inventory key included in the generated planned data to the E2EO module 62 (Step S403).

Then, the E2EO module 62 outputs the inventory key that has been received to the CMaaS module 68 (Step S404).

The CMaaS module 68 then acquires planned data including the received inventory key from the inventory database 82 (Step S405).

Then, the CMaaS module 68 generates and holds planned CM data including a day 1 parameter based on the planned data acquired in the process step of Step S405 (Step S406).

The CMaaS module 68 outputs an instruction for a setup, for example, securing required hardware resources, to the BMaaS module 84 (Step S407), and the BMaaS module 84 executes a setup, for example, securing hardware resources in accordance with the instruction (Step S408). At this time, the setup of system software in accordance with a specific type of functional unit and addition of a free server to the resource pool are executed as required.

In this embodiment, a free server may be added to the resource pool with an enough margin (buffer). For example, a plurality of servers 90 may be collectively added to the resource pool.

Then, when the BMaaS module 84 outputs a completion notification to the CMaaS module 68 (Step S409), the CMaaS module 68 updates the resource pool management data (Step S410). For example, the value of the remaining core number data of the resource pool for which the hardware resources are secured may be subtracted. Further, the number of free servers and the value of the total core number data may be updated. In the process step of Step S410, instead of the CMaaS module 68, the BMaaS module 84 may update the resource pool management data. Further, the inventory management module 66 may update the resource pool management data in accordance with an instruction from the CMaaS module 68.

Then, the CMaaS module 68 outputs a completion notification to the E2EO module 62 (Step S411).

Then, the E2EO module 62 outputs the inventory key received in the process step of Step S403 to the service manager module 70 (Step S412).

The service manager module 70 then acquires planned data including the received inventory key from the inventory database 82 (Step S413).

Then, the service manager module 70 identifies a location at which the functional unit group is deployed based on the planned data acquired in the process step of Step S418 (Step S414).

The service manager module 70 then generates a day 0 parameter (CNF instance) for each location identified in the process step of Step S414 (Step S415).

Then, to a container management module 78 corresponding to each location identified in the process step of Step S414, the service manager module 70 outputs a day 0 parameter corresponding to the container management module 78 (Step S416).

The container management module 78 then executes the deployment of a container based on the day 0 parameter that has been received (Step S417).

The container management module 78 then outputs a completion notification to the service manager module 70 (Step S418).

Then, the service manager module 70 outputs the completion notification to the E2EO module 62 (Step S419).

The E2EO module 62 then outputs a configuration management instruction that is based on the day 1 parameter to the CMaaS module 68 (Step S420).

Then, the CMaaS module 68 executes the configuration management of a container group that is based on the day 1 parameter included in the held planned CM data (Step S421).

The CMaaS module 68 then outputs a completion notification to the E2EO module 62 (Step S422).

Then, the E2EO module 62 outputs the inventory key received in the process step of Step 5403 to the slice manager module 72 (Step S423).

The slice manager module 72 then acquires planned data including the received inventory key from the inventory database 82 (Step S424).

Then, the slice manager module 72 executes the instantiation of a network slice based on the planned data acquired in the process step of Step S429 (Step S425). In the process step of Step S425, for example, as described above, the slice manager module 72 may output a configuration management instruction related to the instantiation of the network slice to the CMaaS module 68. Then, the CMaaS module 68 may execute configuration management, for example, settings in accordance with the configuration management instruction.

Further, as described above, the CMaaS module 68 may update the day 1 parameter based on the configuration management instruction received from the slice manager module 72 in the process step of Step S425 without executing the process steps of from Step S420 to Step S422. Then, the CMaaS module 68 may execute configuration management, for example, settings in accordance with the configuration management instruction.

Then, the slice manager module 72 outputs a completion notification to the E2EO module 62 (Step S426).

The E2EO module 62 then outputs the inventory key received in the process step of Step S403 to the monitoring management module 74 (Step S427).

Then, the monitoring management module 74 acquires planned data including the received inventory key from the inventory database 82 (Step S428).

Based on the planned data acquired in the process step of Step S428, the monitoring management module 74 then executes a monitoring setting in accordance with a monitoring policy indicated by the purchase service requirement data (Step S429).

Then, the monitoring management module 74 outputs a completion notification to the E2EO module 62 (Step S430).

The E2EO module 62 then outputs the inventory key received in the process step of Step S403 to the security setting module 76 (Step S431).

Then, the security setting module 76 acquires planned data including the received inventory key from the inventory database 82 (Step S432).

The security setting module 76 then executes a security setting based on the planned data acquired in the process step of Step S432 (Step S433).

Then, the security setting module 76 outputs a completion notification to the E2EO module 62 (Step S434), and the process shown in this process example is ended.

A summary is now given of operations performed during network service provisioning, which is triggered by the purchase of the service by the purchaser. The purchased service is hereinafter referred to as “service to be purchased.” The E2EO module 62 starts executing a workflow corresponding to the service to be purchased selected by the purchaser. The E2EO module 62 and the inventory management module 66 create planned data for the service to be purchased by filling in the inventory data (for example, IP address and host name) in the inventory template of the service to be purchased, that is, by setting inventory data in the variable items of the inventory template.

The service manager module 70 creates day 0 data (a day 0 parameter) by filling in the content indicated by the planned data in the service template data of the service to be purchased. The service manager module 70 passes the created day 0 data to the container management module 78 (Kubernetes). The container management module 78 generates a CNF (that is, an application) for the service to be purchased based on the day 0 data.

The CMaaS module 68 creates day 1 data (a day 1 parameter) by filling in the content indicated by the planned data in the CM template data of the service to be purchased. The CMaaS module 68 inputs the created day 1 data to the CNF for the service to be purchased.

The slice manager module 72 creates slice data by filling in the content indicated by the planned data in the slice template data of the service to be purchased. The slice manager module 72 passes the created slice data to the CMaaS module 68. The CMaaS module 68 inputs the settings of the network slices and the network slice subnets to the CNF (that is, an application) based on the slice data.

The monitoring management module 74 executes a monitoring process on the functional unit group based on the information on the functional unit group (for example, CNFs) to be constructed and monitoring script data distributed during the onboarding of the bundle file. For example, the monitoring management module 74 may create monitoring setting data by filling the content indicated by the planned data as information on the functional unit group to be constructed in the monitoring script data of the service to be purchased. The monitoring management module 74 may start the monitoring process based on the monitoring setting data. The monitoring setting data includes, for example, (1) a monitoring frequency, (2) an object to be monitored and the hierarchical structure of the object, (3) logic for calculating a KPI from metric data obtained from a CNFC, and (4) a threshold value which triggers transmission of alarm information.

Description is now given of another example of creating the monitoring setting data by the monitoring management module 74. The service manager module 70 may notify the inventory management module 66 of information on the NSes, CNFs, and CNFCs (for example, information on the IP address and host name) constructed in connection with the purchase of the service by the purchaser, and the inventory management module 66 may store the information in the inventory database 82 in association with the service to be purchased. The service manager module 70 may pass the information on the NSes, CNFs, and CNFCs to be constructed to a plurality of container management modules 78, and the inventory management module 66 may acquire the information from the plurality of container management modules 78 and store the acquired information in the inventory database 82. The monitoring management module 74 may also create the monitoring setting data by acquiring the information on the NSes, CNFs, and CNFCs of the service to be purchased from the inventory management module 66 (inventory database 82) and setting the acquired information in the variable items of the monitoring script data of the service to be purchased. The monitoring management module 74 may also acquire the information on the NSes, CNFs, and CNFCs constructed by the service manager module 70 directly from the service manager module 70.

Further, the monitoring management module 74 may acquire the information on the NSIs and NSSIs of the service to be purchased (for example, NSI and NSSI setting information) from the slice manager module 72. The monitoring management module 74 may create the monitoring setting data by setting the information on the NSIs and NSSIs of the service to be purchased in the variable items of the monitoring script data of the service to be purchased. The slice manager module 72 may notify the inventory management module 66 of the information on the NSIs and NSSIs of the service to be purchased. In this case, the monitoring management module 74 may acquire the information on the NSIs and NSSIs of the service to be purchased from the inventory management module 66.

With the NOS 12 in the first embodiment, when the vendor providing the network service uploads to the NOS 12 a bundle file including first data (for example, technology section data) defining the functional units that achieve the network service and second data (for example, operation section data) defining a monitoring policy for the network services, construction of the functional unit group that achieves the network service and the monitoring setting for the network service are automatically executed with purchasing of the network service by the purchaser as a trigger. The vendor can flexibly construct the network service by adjusting the contents of the bundle file. Further, the network service can be quickly provided to the purchaser in response to the purchase of the network service by the purchaser.

In the above, the present invention has been described based on the first embodiment. This embodiment is given as an example. A person skilled in the art would understand that various modification examples are possible in the combinations of the components and processing processes, and that those modifications examples are also within the scope of the present invention.

For example, the network service to be provided to the purchaser may be implemented by a virtualized network function (VNF), which is a virtual machine (VM)-based functional unit that uses a hypervisor-type or host-type virtualization technology, instead of a CNF, which is a container-based functional unit. When a specific type of functional unit is deployed in an unused hardware resource (for example, a free server in this case), the setup of system software in accordance with the specific type of functional unit may be performed on a host OS serving as a platform of a virtual machine environment.

Further, for example, the division of roles for each function illustrated in FIG. 10 is not limited to that illustrated in FIG. 10 . For example, part of the processes performed by the E2EO module 62 may be performed by the inventory management module 66. Further, for example, part of the processes performed by the inventory management module 66 may be performed by the E2EO module 62.

Further, in this embodiment, the repository module 80 is not required to be included in the NOS 12. The bundle development module 60 may store the helm chart data and the container image data in the container management module 78. Then, the container management module 78 may deploy the container image stored in the container management module 78.

Further, in this embodiment, the bundle development module 60 is not required to be included in the NOS 12. For example, a bundle file may be on-boarded from an external file transfer server.

A person skilled in the art would also understand that each of the functions to be achieved by the constituent features recited in the claims is implemented alone by each of the components described in the first embodiment and the modification examples or by the components working together. For example, the “reception module” recited in the claims can be implemented by the bundle development module 60 of the NOS 12 in the first embodiment. Further, the “construction module” recited in the claims can be implemented by one or a combination of the CMaaS module 68, the service manager module 70, the slice manager module 72, and the container management module 78 of the NOS 12 in the first embodiment.

Second Embodiment

This embodiment is mainly described with a focus on the differences from the first embodiment, and description of the points in common is omitted as appropriate. In this embodiment, components that are the same as or correspond to the components of the first embodiment are denoted by the same reference symbols for description.

The configuration of the computer system 1 of the second embodiment is the same as the configuration of the computer system 1 (FIG. 1 ) of the first embodiment. Further, the functional blocks included in the NOS 12 in the second embodiment are the same as the functional blocks (FIG. 10 ) included in the NOS 12 in the first embodiment.

Description is now given of an outline of the NOS 12 in the second embodiment. The NOS 12 in the second embodiment acquires information on the operation of each of a plurality of network functions that achieve the network slices constructed on a mobile wireless communication network. The information on the operation of each of the plurality of network functions is measured by one or more apparatus that provide at least a part of the plurality of network functions. The NOS 12 in the second embodiment derives an evaluation index value of the plurality of network functions based on the acquired information on the operation of the plurality of network functions, and derives an evaluation index value of the network slices based on the evaluation index value of the plurality of network functions. As a result, an evaluation index value of each network slice constructed in the mobile wireless communication network can be obtained, and the evaluation and maintenance of each network slice can be supported.

As described with reference to FIG. 7 in the first embodiment, the network services provided to the purchaser are formed into a hierarchy of (1) an NSI, (2) one or more NSSIs included in the NSI, (3) one or more NSes implementing each NSSI, (4) one or more CNFs implementing each NS, and (5) one or more CNFCs (microservices) implementing each CNF. The NOS 12 in the second embodiment goes back in the hierarchy from the lowest microservice to the top-level NSI, and sequentially derives the KPI value of each CNFC (microservice), CNF, NS, NSSI, and NSI.

The configuration of the NOS 12 in the second embodiment is now described in detail. As described in the first embodiment, the monitoring management module 74 creates monitoring setting data by setting information on a functional unit group for achieving the service to be purchased in the variable items of the monitoring script data distributed when the bundle file is on-boarded from the vendor terminal 16.

The monitoring setting data (monitoring script data) includes logic (hereinafter also referred to as “KPI derivation logic”) for deriving, based on metric data output from the plurality of CNFCs forming the service to be purchased, the evaluation index value of each of the NSI, the

NSSI, the NS, the CNF, and the CNFC (hereinafter also referred to as “KPI”), which are the functional unit group forming the service to be purchased.

The metric data output from the CNFCs includes information on the operation or state of the CNFCs. For example, the metric data may include (1) a throughput indicating a data processing amount over a predetermined period, (2) a connection completion rate of telephone lines and packet communication, and (3) a CPU usage rate of the CNFCs.

The KPI of each of the NSI, the NSSI, the NS, the CNF, and the CNFC may be an index defined as an SLA, and, for example, includes the throughput and the connection completion rate. The KPIs of those network elements may include (1) a target value or guaranteed value of the throughput, (2) a target value or guaranteed value of the connection completion rate, and (3) a target value or guaranteed value of the number of simultaneous connections. Further, the KPIs of those network elements may include a KPI described in the 3GPP specification, for example, a KPI described in “TS 28.552, Management and orchestration; 5G performance measurements” or “TS 28.554, Management and orchestration; 5G end to end Key Performance Indicators (KPI).”

The KPI derivation logic may include (1) the ID of each of the NSI, the NSSI, the NS, the CNF, and the CNFC, and (2) a calculation expression for deriving the KPI of each of the NSI, the NSSI, the NS, the CNF, and the CNFC. The KPI derivation logic may also include (3) information on an identification tag for identifying the metric data to be used in the calculation expression, that is, information for identifying the type of the metric data to be used in the calculation expression and the CNFC from which the notification has come. The calculation expression may an expression for determining a total value or an average value of a plurality of pieces of metric data or a plurality of KPIs.

The KPI derivation logic in this embodiment may include a calculation expression for determining the KPI of a higher-level element by accumulating the KPIs of lower-level elements in the network hierarchy data. In other words, the KPI derivation logic may include a calculation expression which derives KPIs in order of CNFCs, CNFs, NSes, NSSIs, and NSIs. For example, the KPI derivation logic of a given CNFC may include a calculation expression for determining the total value or average value of the metric data notified from the CNFC. Further, the KPI derivation logic of a given CNF may include a calculation expression for determining the total value or average value of the KPI values of a plurality of CNFCs corresponding to the CNF.

Further, the KPI derivation logic of a given NS may include a calculation expression for determining the total value or average value of the KPI values of a plurality of CNFs corresponding to the NS. Further, the KPI derivation logic of a given NSSI may include a calculation expression for determining the total value or average value of the KPI values of a plurality of NSes corresponding to the NSSI. Further, the KPI derivation logic of a given NSI may include a calculation expression for determining the total value or average value of the KPI values of a plurality of NSSIs corresponding to the NSI.

FIG. 26 schematically shows cooperation among a plurality of functional blocks of the NOS 12 in the second embodiment. In FIG. 26 , there is illustrated cooperation during monitoring of a network service (that is, during operation).

A CNF (RAN) 102 provides at least a part of the functions of, for example, an eNodeB (that is, LTE base station) or a gNB (that is, 5G base station). A CNF (SW) 104 provides, for example, a function of a Layer 2 switch or a Layer 3 switch. A CNF (core) 106 provides at least a part of the core network functions, for example, AMF and MME. The CNF (RAN) 102, the CNF (SW) 104, and the CNF (core) 106 are, for example, components of one NSI 100.

A plurality of CNFs (in the example of FIG. 8 , CNF

(RAN) 102, CNF (SW) 104, and CNF (core) 106) distributed and deployed across a plurality of servers 90 measure the metric data set by the slice manager module 72 at the time of setting the network slice, and periodically transmit the metric data to the monitoring management module 74. The metric data transmitted from a given CNF includes one or more pieces of metric data specified at the time of setting the network slice, and also includes the identification tag assigned to the CNF.

The monitoring management module 74 includes a function of an acquisition module which acquires information on the operation of each network function which is measured by one or more apparatus that provide at least a part of the plurality of network functions. In this embodiment, as information on the operation of each network function, the monitoring management module 74 acquires metric data on the operation of one or more CNFs associated with each network function.

In the example of FIG. 26 , the monitoring management module 74 receives metric data for each CNF transmitted from the apparatus (for example, server 90) in which the container (that is, pod) corresponding to each of the CNF (RAN) 102, the CNF (SW) 104, and the CNF (core) 106 is deployed.

A sidecar container which aggregates metric data output from a plurality of containers into CNFC (microservice) units may be deployed on the server 90. This sidecar container may include an agent referred to as “exporter.” The monitoring management module 74 may repeatedly execute a process of acquiring the metric data aggregated in microservice units from the sidecar container at a monitoring frequency defined in the monitoring setting data by using the Prometheus mechanism.

Further, the monitoring management module 74 includes a function of a derivation module which derives an evaluation index value of a plurality of network functions based on the information on the operation of the plurality of network functions, and derives an evaluation index value of the network slices based on the evaluation index values of the plurality of network functions. The monitoring management module 74 derives the KPI value of each of the plurality of network elements (NSIs, NSSIs, NSes, CNFs, and CNFCs) associated by the network hierarchy data based on the KPI derivation logic for each network element set in the monitoring setting data and the metric data for the plurality of CNFCs. The monitoring management module 74 derives the KPI values in a bottom-up manner in order from the KPI values of the lower-level CNFCs to the KPI values of the upper-level NSIs.

A first specific example of deriving the KPIs by the monitoring management module 74 is now described. The monitoring management module 74 may derive the KPI value of each element of the network hierarchy data by the following procedures (1) to (5).

(1) Based on the metric data of each of a plurality of CNFCs, the KPI value of each of the plurality of CNFCs is derived.

(2) Based on the total value or average value of the KPI values of the plurality of CNFCs, the KPI value of the higher-level CNFs (here, a plurality of CNFs) corresponding to the plurality of CNFCs is derived.

(3) Based on the total value or average value of the KPI values of the plurality of CNFs, the KPI value of the higher-level NSes (here, a plurality of NSes) corresponding to the plurality of CNFs is derived.

(4) Based on the total value or average value of the KPI values of the plurality of NSes, the KPI value of the higher-level NSSIs (here, a plurality of NSSIs) corresponding to the plurality of NSes is derived.

(5) Based on the total value or average value of the KPI values of the plurality of NSSIs, the KPI value of the higher-level NSIs (one or a plurality of NSIs) corresponding to the plurality of NSSIs is derived.

The monitoring management module 74 compares the derived KPI value (also referred to as “KPI derivation value”) of each of the plurality of CNFCs with a KPI threshold value of each CNFC set in the monitoring setting data. When the relationship between the KPI derivation value of a given CNFC and the KPI threshold value of the CNFC satisfies an alert condition set in the monitoring setting data, the monitoring management module 74 outputs alert information including a pair of the ID of the CNFC and the KPI derivation value to the container management module 78. The alert condition may be defined in accordance with the type of the KPI. For example, the alert condition may be the KPI derivation value becoming less than the KPI threshold value, or the KPI derivation value exceeding the KPI threshold value.

Further, the monitoring management module 74 compares the KPI derivation value of each of the plurality of CNFs with a KPI threshold value of each CNF set in the monitoring setting data. When the relationship between the KPI derivation value of a given CNF and the KPI threshold value of the CNF satisfies an alert condition set in the monitoring setting data, the monitoring management module 74 outputs alert information including a pair of the ID of the CNF and the KPI derivation value to the service manager module 70.

Further, the monitoring management module 74 compares the KPI derivation value of each of the plurality of NSes with a KPI threshold value of each NS set in the monitoring setting data. When the relationship between the KPI derivation value of a given NS and the KPI threshold value of the NS satisfies an alert condition set in the monitoring setting data, the monitoring management module 74 outputs alert information including a pair of the ID of the NS and the KPI derivation value to the service manager module 70.

Further, the monitoring management module 74 compares the KPI derivation value of each of the plurality of NSSIs with a KPI threshold value of each NSSI set in the monitoring setting data. When the relationship between the KPI derivation value of a given NSSI and the KPI threshold value of the NSSI satisfies an alert condition set in the monitoring setting data, the monitoring management module 74 outputs alert information including a pair of the ID of the NSSI and the KPI derivation value to the slice manager module 72.

Further, the monitoring management module 74 compares the KPI derivation value of each of the plurality of NSIs with a KPI threshold value of each NSI set in the monitoring setting data. When the relationship between the KPI derivation value of a given NSI and the KPI threshold value of the NSI satisfies an alert condition set in the monitoring setting data, the monitoring management module 74 outputs alert information including a pair of the ID of the NSI and the KPI derivation value to the slice manager module 72.

A second specific example of deriving the KPIs by the monitoring management module 74 is now described. This example is described as an operation of the monitoring management module 74, but the operation may be defined in the calculation logic in the monitoring setting data (that is, monitoring script data included in the bundle file) referred to by the monitoring management module 74.

FIG. 27 shows an example of network hierarchy data relating to a given purchaser. The network hierarchy data of

FIG. 27 includes an NSI 110, an NSSI 112, an NS 114 a, an NS 114 b, and an NS 114 c. Although not shown in FIG. 27 , CNFs and CNFCs are further linked below each of the NS 114 a, the NS 114 b, and the NS 114 c. In this example, as the throughput value used as the KPI of the NSSI 112, the monitoring management module 74 may calculate an arithmetical average value of the throughput value used as the KPI of the NS 114 b and the throughput value used as the KPI of the NS 114 c.

It is assumed that the NS 114 b is an IP telephone service of the core domain, the NS 114 c is an IP telephone service of the RAN domain, and the NSSI 112 is an NSSI for an IP telephone service that spans from the RAN domain to the core domain. In this case, as the value of the connection completion rate used as the KPI of the NSSI 112, the monitoring management module 74 may calculate the product of the value of the connection completion rate used as the KPI of the NSI 114 b and the value of the connection completion rate used as the KPI of the NS 114 c.

A third specific example of deriving the KPIs by the monitoring management module 74 is now described. This example is described as an operation of the monitoring management module 74, but the operation may be defined in the calculation logic in the monitoring setting data (that is, monitoring script data included in the bundle file) referred to by the monitoring management module 74.

The monitoring management module 74 may derive, as the KPIs for a plurality of NSes, (1) a radio resource control (RRC) connection completion rate (KPI of RAN domain NS), (2) an attach success rate (KPI of core domain NS), and (3) an EPS radio access bearer (ERAB) established success rate (KPI of core domain NS). The monitoring management module 74 may derive, as the KPI value (for example, connection completion rate) of an NSI (or NSSI) at a higher-level of the plurality of NSes, the product of (1) the average value of the RRC connection completion rate, (2) the average value of the attach success rate, and (3) the average value of the ERAB established success rate. The average value of the RRC connection completion rate may use the average value of the RRC connection completion rate over a plurality of gNBs belonging to the same NSI (or NSSI).

Referring back to FIG. 26 , the slice manager module 72 includes a function of a change module which autonomously changes the setting of at least one of the NSI or the NSSI in accordance with the KPI value of each of the NSI and the NSSI derived by the monitoring management module 74. In the second embodiment, the slice manager module 72 autonomously changes the setting of at least one of the NSI or the NSSI in accordance with the KPI derivation value of the NSI or the NSSI indicated by the alert information notified from the monitoring management module 74.

When the slice manager module 72 constructs the NSIs and the NSSIs, the slice manager module 72 may store the KPI threshold value of each of the NSI and the NSSI described in the purchase service requirement data (or slice template data). Further, configuration change details corresponding to the KPI derivation value of each of the NSI and the NSSI may be defined in the purchase service requirement data (or slice template data). The slice manager module 72 may compare the KPI derivation value of the NSI or the NSSI notified from the monitoring management module 74 with the KPI threshold value, and execute the configuration change (changing the setting of at least one of the NSI or the NSSI) defined by the purchase service requirement data (or slice template data) in accordance with the comparison result.

For example, when the KPI derivation value (for example, connection completion rate) of the NSI or the NSSI notified from the monitoring management module 74 is less than a predetermined KPI threshold value, the slice manager module 72 may scale out the CNF (referred to as “corresponding CNF”) associated with the NSI or the NSSI in the network hierarchy data.

As an example of scaling out, the slice manager module 72 may deploy a new CNF having the same function as that of the corresponding CNF in the server 90 in cooperation with the service manager module 70 and the container management module 78. The slice manager module 72 may further apply the setting relating to the NSI or the NSSI to the new CNF in the same way as the corresponding CNF in cooperation with the CMaaS module 68. As another example of scaling out, the slice manager module 72 may increase the number of pods in the corresponding CNF in cooperation with the container management module 78.

Further, when the KPI derivation value (in this example, the throughput) of the NSI or the NSSI notified from the monitoring management module 74 is less than the predetermined KPI threshold value, the slice manager module 72 may change a quality of service (QoS) setting for the NSI or the NSSI. As an example of changing the QoS, the slice manager module 72 may change, in cooperation with the CMaaS module 68, a shaving value set for the CNF corresponding to the NSI or the NSSI in the network hierarchy data to a value larger than the previous value.

Further, the slice manager module 72 may store a transition over time of the KPI derivation values of each of the NSI and the NSSI, or that is, derive a trend of the change in the KPI derivation values. For example, the slice manager module 72 may scale out the CNF corresponding to the NSI or the NSSI when (1) the connection completion rate used as the

KPI of the NSI or the NSSI has a decreasing trend, (2) the connection completion rate per unit time has decreased by more than a predetermined threshold value, or (3) the rate of decrease in the connection completion rate exceeds a predetermined threshold value.

Further, the slice manager module 72 may change the QoS setting (for example, shaving value) for the NSI or the NSSI when (1) the throughput used as the KPI of the NSI or the NSSI has a decreasing trend, (2) the throughput per unit time has decreased by more than a predetermined threshold value, or (3) the rate of decrease in the throughput exceeds a predetermined threshold value.

The service manager module 70 changes, in cooperation with the container management module 78, the configuration of an NS or a CNF in accordance with the KPI derivation value of the NS or the CNF notified from the monitoring management module 74. The container management module 78 changes the configuration of the CNF in accordance with the KPI derivation value of the CNFC notified from the monitoring management module 74.

With the NOS 12 in the second embodiment, highly accurate KPI values can be obtained for network slices (NSIs and NSSIs) constructed in a mobile communication network virtualized by network functions virtualization (NFV) and software-defined networking (SDN). For example, even when a given network slice is constructed across a plurality of servers 90, or one server 90 is shared by a plurality of network slices, a highly valid KPI value for each network slice can be obtained. As a result, the evaluation, operation, and maintenance of the individual network slices can be appropriately supported.

Further, the NOS 12 in the second embodiment derives the KPI values of the network slices based on the total value or average value of the KPI values of a plurality of network functions. Specifically, the NOS 12 sequentially derives the KPI values in order from the lower-level elements to the higher-level elements for the NSIs-NSSIs-NSes-CNFs-CNFCs associated in the network hierarchy data. As a result, the KPI value of each element in the network hierarchy data can be appropriately derived.

Further, with the NOS 12 in the second embodiment, the setting of a network slice (for example, the number of CNFCs, resources of CNFCs, or QoS setting) is automatically and autonomously changed in accordance with the KPI value of the network slice. As a result, the appropriate setting of the network slice can be maintained, and efficient operation and maintenance can be achieved.

In the above, the present invention has been described based on the second embodiment. This embodiment is given as an example. A person skilled in the art would understand that various modification examples are possible in the combinations of the components and processing processes, and that those modifications examples are also within the scope of the present invention. A person skilled in the art would also understand that each of the functions to be achieved by the constituent features recited in the claims is implemented alone by each of the components described in the second embodiment and the modification examples or by the components working together.

Description is now given of a modification example of the second embodiment. The slice manager module 72 may transmit information on the set NSIs and NSSIs, information on the configuration at or below the NS in which the slice is set, and SLA information on each network element to the monitoring management module 74. The monitoring management module 74 may derive the KPI values of the NSIs and NSSIs from the KPI values or metric data relating to the NS based on the information received from the slice manager module 72.

Description is now given of another modification example of the second embodiment. The monitoring management module 74 may hold the KPI derivation logic of the NSIs and

NSSIs, or derive the KPI values of the NSIs and NSSIs. In this case, the monitoring management module 74 may transmit to the slice manager module 72 the data required for deriving the KPI values of the NSIs and NSSIs, for example, the metric data acquired relating to those NSIs and NSSIs, and/or the KPI values of the NSes, CNFs, and CNFCs associated with the NSIs and NSSIs.

Description is now given of yet another modification example of the second embodiment. The slice manager module 72 may compare the KPI derivation value of the

NSIs and NSSIs with a KPI threshold value and output an alert based on the comparison result. In this case, the part that derives the KPI values of the NSIs and NSSIs may be the monitoring management module 74 like in the second embodiment, or may be the slice manager module 72 like in the modification example described above. In the latter case, the monitoring management module 74 may acquire only the metric value to be monitored, and the processes after KPI calculation may be performed by the slice manager module 72.

Any combination of the above-mentioned embodiments and modifications examples is also valid as an embodiment of the present invention. New embodiments resulting from such combinations have the advantageous effects of the embodiments and modifications examples included in the combination.

INDUSTRIAL APPLICABILITY

The technology of the present disclosure is applicable to a computer system.

REFERENCE SIGNS LIST

1 computer system, 12 NOS, 14 purchaser terminal, 16 vendor terminal, 60 bundle development module, 62 E2EO module, 70 service manager module, 72 slice manager module, 74 monitoring management module, 90 server. 

1. A computer system, comprising: at least one processor; and at least one memory device storing instructions which, when executed by the at least one processor, cause the at least one processor to perform operations comprising: acquiring, for a plurality of network functions that achieve a network slice constructed on a mobile wireless communication network, information on an operation of each of the plurality of network functions which is measured by one or more apparatus configured to provide at least a part of the plurality of network functions; and deriving an evaluation index value of each of the plurality of network functions based on the information on the operation of each of the plurality of network functions which is acquired, and derive an evaluation index value of the network slice based on the evaluation index values of the plurality of network functions.
 2. The computer system according to claim 1, wherein the operations further comprise changing a setting of the network slice in accordance with the evaluation index value of the network slice which is derived.
 3. The computer system according to claim 1, wherein the deriving comprises deriving the evaluation index value of the network slice based on a total value or an average value of the evaluation index values of the plurality of network functions.
 4. The computer system according to claim 1, wherein each of the plurality of network functions is achieved by one or more microservices implemented as containers, wherein the acquiring comprises acquiring, as information on an operation of a certain network function, information on an operation of one or more microservices associated with the certain network function, and wherein the deriving comprises deriving an evaluation index value of each of the one or more microservices, and derive an evaluation index value of the certain network function based on the evaluation index values of the one or more microservices.
 5. The computer system according to claim 1, wherein the network slice is divided into a plurality of network slice subnets, and the plurality of network slice subnets are achieved by a plurality of network functions, and wherein the deriving comprises deriving an evaluation index value of each of the plurality of network slice subnets based on the evaluation index values of the plurality of network functions, and derive the evaluation index value of the network slice based on the evaluation index values of the plurality of network slice subnets.
 6. A network slice management method, which is executed by a computer, the network slice management method comprising: acquiring, for a plurality of network functions that achieve a network slice constructed on a mobile wireless communication network, information on an operation of each of the plurality of network functions which is measured by one or more apparatus configured to provide at least a part of the plurality of network functions; and deriving an evaluation index value of each of the plurality of network functions based on the information on the operation of each of the plurality of network functions which is acquired, and deriving an evaluation index value of the network slice based on the evaluation index values of the plurality of network functions. 